Page 1 of 95
DIVEMASTER FINAL EXAM 2026| A
COMPLETE TEST , PRACTICE
QUESTIONS, VERIFIED ANSWER KEY,
AND STUDY GUIDE FOR (LATEST 2026
EDITION)
1. A diver descends to 20 meters (66 feet) in salt water. What is
the ambient pressure?
a) 2 ata
b) 3 ata
c) 4 ata
d) 5 ata
2. According to Boyle’s Law, if a diver holds their breath during
ascent from 20m to the surface, the volume of air in their lungs
,Page 2 of 95
would:
a) Double
b) Triple
c) Remain the same
d) Halve
3. A diver uses 25 bar/min at the surface. What will their
consumption rate be at 30 meters (4 ata)?
a) 50 bar/min
b) 75 bar/min
c) 100 bar/min
d) 125 bar/min
4. The difference between gauge pressure and absolute
pressure is:
a) 14.7 psi or 1 bar
b) 33 fsw or 10 msw
,Page 3 of 95
c) Both A and B
d) Vapor pressure
5. A scuba cylinder contains 200 bar of 32% Nitrox. What is the
partial pressure of Oxygen (PO2) at 30 meters (4 ata)?
a) 0.64 ata
b) 1.28 ata
c) 1.60 ata
d) 2.00 ata
6. Which gas law explains why a diver feels cold even in warm
water when using a cylinder?
a) Charles’ Law
b) Dalton’s Law
c) Henry’s Law
d) Archimedes’ Principle
7. If a diver’s cylinder is completely submerged in freshwater,
how much buoyant force is lost compared to saltwater?
, Page 4 of 95
a) The cylinder is heavier in freshwater
b) The cylinder is lighter in freshwater
c) No difference
d) The cylinder will always sink
8. The refractive index of water causes objects to appear:
a) Larger and further away
b) Smaller and closer
c) Larger and closer
d) Smaller and further away
9. A DM is leading a dive at 30m (4 ata). One diver panics and
consumes air at 3x the normal rate (normal RMV 20L/min). What
is the minute volume?
a) 80 L/min
b) 120 L/min
c) 240 L/min
d) 60 L/min
DIVEMASTER FINAL EXAM 2026| A
COMPLETE TEST , PRACTICE
QUESTIONS, VERIFIED ANSWER KEY,
AND STUDY GUIDE FOR (LATEST 2026
EDITION)
1. A diver descends to 20 meters (66 feet) in salt water. What is
the ambient pressure?
a) 2 ata
b) 3 ata
c) 4 ata
d) 5 ata
2. According to Boyle’s Law, if a diver holds their breath during
ascent from 20m to the surface, the volume of air in their lungs
,Page 2 of 95
would:
a) Double
b) Triple
c) Remain the same
d) Halve
3. A diver uses 25 bar/min at the surface. What will their
consumption rate be at 30 meters (4 ata)?
a) 50 bar/min
b) 75 bar/min
c) 100 bar/min
d) 125 bar/min
4. The difference between gauge pressure and absolute
pressure is:
a) 14.7 psi or 1 bar
b) 33 fsw or 10 msw
,Page 3 of 95
c) Both A and B
d) Vapor pressure
5. A scuba cylinder contains 200 bar of 32% Nitrox. What is the
partial pressure of Oxygen (PO2) at 30 meters (4 ata)?
a) 0.64 ata
b) 1.28 ata
c) 1.60 ata
d) 2.00 ata
6. Which gas law explains why a diver feels cold even in warm
water when using a cylinder?
a) Charles’ Law
b) Dalton’s Law
c) Henry’s Law
d) Archimedes’ Principle
7. If a diver’s cylinder is completely submerged in freshwater,
how much buoyant force is lost compared to saltwater?
, Page 4 of 95
a) The cylinder is heavier in freshwater
b) The cylinder is lighter in freshwater
c) No difference
d) The cylinder will always sink
8. The refractive index of water causes objects to appear:
a) Larger and further away
b) Smaller and closer
c) Larger and closer
d) Smaller and further away
9. A DM is leading a dive at 30m (4 ata). One diver panics and
consumes air at 3x the normal rate (normal RMV 20L/min). What
is the minute volume?
a) 80 L/min
b) 120 L/min
c) 240 L/min
d) 60 L/min
